suzuki 88 dt55

[masonj]

have a suzuki dt55 1988 won't start. have compression, fire, fuel. spark is not a blue spark. plugs look wet when removed, but can't tell if its gas or oil.

 

[jim dozier]

Re: suzuki 88 dt55

When you say you have fuel, is it getting into the cylinders? Remove the air box on the carburetors and squirt some premix into the carburetor throats and see if it fires. If it does you don't have fuel where it needs to be. Also is sounds like your spark is weak. You should be able to jump a strong blue spark about 1/2 inch from the plug wire. If you have spark at the plug wire but not the plugs get new plugs. When was the last time the engine was running right?

 

[masonj]

Re: suzuki 88 dt55

that's what is puzzling me. I took the head off and cleaned also took off exhaust cover and cleaned. took off carboraters and cleaned. put all back together and it cranked right up and ran good. was pumping water and running like a top. 4 days later put it in the water and it wouldn't start. have not been able to get it started. last time it ran was last week.

 

[masonj]

Re: suzuki 88 dt55

just went out and sprayed some premixed gas into carbs. she started right up. killed it and started right up again. now. what would cause that to happen. maybe need some carb kits?

 

[rickdb1boat]

Re: suzuki 88 dt55

Hi duckdog3 <br /><br />Are you pumping up the primer bulb until firm? Are you choking it when starting? Is it working properly? If so, might be a fuel pump problem.

 

[masonj]

Re: suzuki 88 dt55

bulb was pumped up, choke, was working, fuel pump is working.

 

[jim dozier]

Re: suzuki 88 dt55

At least you know what the problem is, its not getting fuel on the startup. You stated when you had the heads off you cleaned the carburetors, by that do you mean you disassembled them and cleaned each jet with solvent and compressed air and put in new float seats and gaskets or you just washed them off. It is possible that if they weren't properly cleaned and disassembled, by removing them and shaking them up some crud has found its way into the idle jets or somewhere. But back to basics,<br /><br />1. Was the fuel bulb pumped up tight?<br />2. Is your choke working and were you using it?<br />3. Did you readjust the idle mixture screws to the proper setting?<br />4. Are all the fuel hoses that you took off in the disassembly back on tight with no splits or holes?

 

[masonj]

Re: suzuki 88 dt55

yes, I dissasembled the carborators and cleaned them. I didn't put carb kits in though. I usually take the carborators off and break them all the way down, and clean them about twice a year. I am thinking that I may have fowled the plugs. I was reading in the manuel that when you break down your engine you should run a oil fuel mix, even though you have oil injection, for at least half a tank of gas. so I mixed my gas 50to1. so I think there was too much oil.

 

[jim dozier]

Re: suzuki 88 dt55

That may be part of the problem. If you just pulled the heads I would think a squirt of oil into the spark plug holes right before starting would be more than adequate. Others may disagree but I don't see the need for adding pre-mix to an oil-injected engine in your case. Your bearings and crankcase have not been touched and unless you used solvent on you cylinders there is probably oil still in the rings and piston sleeves. I suggest you try it without the pre-mix (but squirt some in the carbs again to get it running and run it until warmed up if you can. There might not be any problem here.

 

[masonj]

Re: suzuki 88 dt55

well, I waited a couple of days and tried to start it again and the same thing. I am sure if I squirt some gas into the carbs it will start right up. I guess I need to take the carbs off and clean and put carb kits in.

 

[fridays]

Re: suzuki 88 dt55

Suzuki's are notoriously cold blooded. Your motor is probably fine except the choke you say is working isn't pulling the plates all the way shut. When the motor is cold try starting it with the manual choke on. If it fires you need to adjust the choke plunger. You could also check by removing the air cover and looking at the choke plates with the choke on.. are they all closing fully? This is a fairly common problem with Suzuki's 55hp thru 140hp.